Exudate-absorptive, adhesive-backed dermal patch for use while collecting a blood sample

• US 4,978,342 A
• Filed: 10/24/1988
• Issued: 12/18/1990
• Est. Priority Date: 02/24/1987
• Status: Expired due to Fees

• Current Assignee: Ken Heimreid
• Original Assignee: Ken Heimreid
• Inventors: Heimreid, Ken
• Primary Examiner(s): Rosenbaum, C. Fred
• Assistant Examiner(s): Daley, Kathleen A.
• Application Number:
  US07/265,793
• Time in Patent Office: 785 Days
• Field of Search: 604/180, 604/174, 604/179, 604/304, 604/305, 604/307, 604/264, 604/240, 128/155, 128/171, 128/DIG. 26, 128/760, 128/762, 128/763, 128/767
• US Class Current: 604/180
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• CPC Class Codes: A61B 5/15003 for venous or arterial blood
• CPC Class Codes: A61B 5/150343 Collection vessels for collecting blood samples from the skin surface, e.g. test tubes, cuvettes sampling from within body cavities A61B5/150015, A61B5/150045
• CPC Class Codes: A61B 5/150755 Blood sample preparation for further analysis, e.g. by separating blood components or by mixing
• CPC Class Codes: A61F 13/023 wound covering film layers without a fluid retention layer
• CPC Class Codes: Y10S 128/26 Cannula supporters

Abstract

An adhesive-backed strip is stuck onto a patient'"'"'s skin. The strip has an opening provided through it at the site where a blood sample is to be taken. On its outer side, the strip is provided with an upstanding annular collar surrounding the opening through the strip, thereby providing a sump bottomed by the surface of the subject'"'"'s skin. The sump receives a plug of liquid-absorptive material. As the subject'"'"'s skin is pierced by a cannula, inserted down through the sump, to take a blood sample, the initial exudate, including capillary blood and other tissue fluids, exudes into the sump where it is absorbed by the plug. Thereafter, venous blood is conventionally drawn into the cannula while the bandage remains in place.

Claims

1. A prepared bandage for use while collecting a blood sample from an animate subject using a transcutaneous cannula,

said bandage comprising:

an adhesive-backed strip arranged to be stuck onto the skin of the subject, said strip having means defining an opening therethrough for surrounding a site where a blood sample is to be taken;

an annular, upstanding collar secured on said strip surrounding said opening so that an inner peripheral surface of said strip surrounding said opening and an inner peripheral surface of said collar, provide a sump, bottomed, in use, by the subject'"'"'s skin;

a plug made of absorptive material capable of absorbing liquid exudate expected from puncturing the skin and subcutaneous tissue for taking venous blood from the subject, said plug being received in said sump and engaged by said inner peripheral surface of said collar so as to be retained in said sump.